Confused negative test took it two months after hvin sec for the 1 at time to a jerk asshole?

Had three periods b4 I took test it was negative and then I got scared caz I was two days late for my period I started last night now should I still be worried or im ok because my half sister wnt help me she freaking me out saying random stuff bout girls hvin babies n bathrooms or miscarrying the baby she cussea at me she then told me I'm fat when I'm not in full figured n she's like skin and bones n e way m I pregnant or not I would luv yr alls advice it will mean lots to Me thank u